System and method for controlling environmentally-friendly vehicle

Abstract

A system and method for controlling an environmentally-friendly vehicle perform a safety function by blocking a high voltage output of a high voltage battery at the time of a rear-lateral side collision of the environmentally-friendly vehicle. The high voltage blocking function is smoothly performed at the time of the rear-lateral side collision accident by determining a rear-lateral side collision of the environmentally-friendly vehicle using a blind spot detection sensor, a lane change alert sensor, or a rear cross traffic alert sensor, along with a yaw rate sensor that detects a yaw rate, and turning off a relay of the high voltage battery at a moment when the rear-lateral side collision is determined.

What is claimed is: 
     
       1. A system for controlling an environmentally-friendly vehicle, the system comprising:
 a rear-lateral side detection sensor configured to detect an expected collision time with and a distance from a collision object; and 
 a controller configured to determine that a rear-lateral side collision occurs and block a connection of a relay of a battery of the vehicle when the expected collision time detected by the rear-lateral side detection sensor is equal to or smaller than a first threshold value and a distance from the collision object detected by the rear-lateral side detection sensor is equal to or smaller than a second threshold value. 
 
     
     
       2. The system of  claim 1 , wherein when a yaw rate detected by a yaw rate detection sensor is equal to or larger than a third threshold value before the connection of the relay of the battery of the vehicle is blocked, the controller blocks the connection of the battery of the vehicle. 
     
     
       3. The system of  claim 1 , wherein the rear-lateral side detection sensor is selected from the group consisting of: a blind spot detection (BSD) sensor, a lane change alert (LCA) sensor, and a rear cross traffic alert (RCTA) sensor. 
     
     
       4. The system of  claim 1 , wherein the rear-lateral side detection sensor is at least one of: a blind spot detection (BSD) sensor, a lane change alert (LCA) sensor, and a rear cross traffic alert (RCTA) sensor. 
     
     
       5. A system for controlling an environmentally-friendly vehicle, the system comprising:
 a rear-lateral side detection sensor configured to detect an expected collision time with and a distance from a collision object; and 
 a controller configured to determine that a rear-lateral side collision occurs and block a connection of a relay of a battery of the vehicle when the expected collision time detected by the rear-lateral side detection sensor is equal to or smaller than a first threshold value, a distance from the collision object detected by the rear-lateral side detection sensor is equal to or smaller than a second threshold value, and a yaw rate detected by a yaw rate detection sensor is equal to or larger than a third threshold value. 
 
     
     
       6. The system of  claim 5 , wherein the rear-lateral side detection sensor is selected from the group consisting of: a blind spot detection (BSD) sensor, a lane change alert (LCA) sensor, and a rear cross traffic alert (RCTA) sensor. 
     
     
       7. The system of  claim 5 , wherein the rear-lateral side detection sensor is at least one of: a blind spot detection (BSD) sensor, a lane change alert (LCA) sensor, and a rear cross traffic alert (RCTA) sensor. 
     
     
       8. A method of controlling an environmentally-friendly vehicle, the method comprising:
 detecting, by a rear-lateral side detection sensor, an expected collision time with and a distance from a collision object; 
 determining whether the expected collision time is equal to or smaller than a first threshold value; 
 determining whether the distance is equal to or smaller than a second threshold value; and 
 blocking a connection of a battery of the vehicle when the expected collision time is equal to or smaller than the first threshold value and the distance is equal to or smaller than the second threshold value. 
 
     
     
       9. The method of  claim 8 , further comprising:
 determining whether a yaw rate of the vehicle is equal to or larger than a third threshold value, 
 wherein when the yaw rate is equal to or larger than the third threshold value, the connection of the battery of the vehicle is blocked. 
 
     
     
       10. The method of  claim 8 , wherein the rear-lateral side detection sensor is selected from the group consisting of: a blind spot detection (BSD) sensor, a lane change alert (LCA) sensor, and a rear cross traffic alert (RCTA) sensor. 
     
     
       11. The method of  claim 8 , wherein the rear-lateral side detection sensor is at least one of: a blind spot detection (BSD) sensor, a lane change alert (LCA) sensor, and a rear cross traffic alert (RCTA) sensor.